Process for the manufacture of 4-amino-3-aminomethylpiperidine

US3971792A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Helmut Zondler · Bottmingen, CH
• Wolfgang Pfleiderer · Konstanz, DE

Key dates

• Filing date: Jun 10, 1974
• Grant date: Jul 27, 1976
• Expiry date: Jun 10, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D401/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The new compound 4-amino-3-aminomethylpiperidine is manufactured by hydrogenating 4-amino-3-cyano-1,2,5,6-tetrahydropyridine under pressure and in the presence of ammonia and a hydrogenation catalyst. The 4-amino-3-cyano-1,2,5,6-tetrahydropyridine used as the starting substance can be obtained by cyclization of bis-cyanoethylenated ammonia. The new compound 4-amino-3-aminomethylpiperidine represents a valuable curing agent for epoxide resins, and advantageously 0.5 to 1.3 equivalents of nitrogen-bonded active hydrogen atoms of the 4-amino-3-aminomethylpiperidine are used per 1 equivalent of epoxide groups of the polyepoxide compound.